An electronic device includes a balloon configured to contact a surface of a human conduit and one or more a biometric sensors operatively coupled to or on or in or within the balloon for detecting a biometric signal. The electronic device in some examples is a biometric sensor or measuring device. In other examples, the electronic device is an integrated device such as an earpiece having biometric sensors. In yet other examples, the electronic device can be operatively coupled to other device and other biometric sensors. Other embodiments are disclosed.